Question

Which of the following is not a Surd.

A)

3

16

B)

27
C)

3

81

D)

3

125​

Answer 1

Answer:

Correct option is

B

4

Surds are numbers left in 'square root form' (or 'cube root form' etc). They are therefore irrational numbers. The reason we leave them as surds is because in decimal form they would go on forever.

4

=2

Hence,

4

is not a Surd.

Options A, C and D cannot be given simplified to rational number , hence they are surd.